Actually, the magnetic induction capability of a coil is rated in "ampere-turns". Very low resistance coil primary windings flow lots of current and produce high secondary voltage, but that happens at the expense of very short point life. A set of conventional contact points can carry about 5 amps and survive for 10,000 miles or so at normal highway speeds. The big Mallory SuperCoil we used back in the 60's on the drag strip with their corresponding dual-point centrifugal advance only distributor used to be the hot setup. The condenser used with that system was about the diameter of a quarter, and about 2 inches tall. It had to be mounted on the outside of the distributor- - - -no room under the cap! Points were good for about one weekend at the drag strip, and the hotrodders were lined up at Dad's shop door on Monday so their daily driver/weekend racer could get them back and forth to work all week!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!